package com.xjy.headfirst.命令模式;

/**
 * decription:
 *
 * @author 辛纪元
 * @since 2022-07-07
 */

public class RemoteControl {

    Command[] onCommands;

    Command[] offCommands;

    Command undoCommand;

    public RemoteControl() {
        onCommands = new Command[7];
        offCommands = new Command[7];
        Command noCommand = new NoCommand();

        for (int i = 0; i < 7; i++) {
            onCommands[i] = noCommand;
            offCommands[i] = noCommand;
        }
        undoCommand = noCommand;
    }

    public void setCommand(int slot, Command onCommand, Command offCommand) {
        onCommands[slot] = onCommand;
        offCommands[slot] = offCommand;
    }

    public void onButtonWasPushed(int slot) {
        onCommands[slot].execute();
        undoCommand = onCommands[slot];
    }

    public void offButtonWasPushed(int slot) {
        offCommands[slot].execute();
        undoCommand = offCommands[slot];
    }

    public void undoCommand() {
        undoCommand.undo();
        System.out.println("=====UNDO====="+undoCommand.getClass().getName());
    }

    @Override
    public String toString() {
        StringBuffer stringBuffer = new StringBuffer();
        stringBuffer.append("\n------Remote Control -------\n");
        for (int i = 0; i < onCommands.length; i++) {
            stringBuffer.append("[slot" + i + "]" + onCommands[i].getClass().getName()
                    + "     " + offCommands[i].getClass().getName() + "\n");
        }
        return stringBuffer.toString();
    }


}
